Luster
Vitreous
Waxy, Silky, Resinous, Greasy
Pleochroism
Weak or absentWalter Schumann
-
Dispersion
0.010.01
0.005
1
👆🏻
Transparency
Transparent, Translucent, Transparent to translucent
TranslucentHerve Nicolas Lazzarelli
Refractive Index
1.53-1.551.530-1.575
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Triclinic
-
Birefringence
0.007-0.010-9999
0
0.296
👆🏻
Clarity
Transparent to translucent
TranslucentHerve Nicolas Lazzarelli